[clang-format][NFC] Don't add a load of 0es

[HazardyKnusperkeks]

Summary

Shift is 0 for all non comments, maybe even for comments. Don't add the 0 up to three times.

clang/lib/Format/WhitespaceManager.cpp

for (unsigned i = Start; i != End; ++i) {
     int Shift = 0;
     if (Changes[i].IsTrailingComment)
       Shift = Column - Changes[i].StartOfTokenColumn;
     if (Changes[i].StartOfBlockComment) {
       Shift = Changes[i].IndentationOffset +
               Changes[i].StartOfBlockComment->StartOfTokenColumn -
               Changes[i].StartOfTokenColumn;
     }
-    if (Shift < 0)
+    if (Shift <= 0)
       continue;
     Changes[i].Spaces += Shift;
     if (i + 1 != Changes.size())
       Changes[i + 1].PreviousEndOfTokenColumn += Shift;
     Changes[i].StartOfTokenColumn += Shift;
   }
 }